import { Auto } from './auto';

/**
 * Listen for an event targeted towards this plugin.
 * @param event Event name
 */
export function EventListener(event: string) {
  return (
    target: any,
    propertyKey: string,
    descriptor: PropertyDescriptor,
  ) => {
    const originalMethod = descriptor.value;
    descriptor.value = function(...args: any[]): void {
      // This ugly hack because TS thinks 'this'
      // is still referring to 'PropertyDescriptor'
      const self = this as any;
      self.stream.on(self.name, event, (...data: any[]) =>
        originalMethod.apply(self, data),
      );
    };
    // Set the function to be autoexecuted when the plugin is initialized.
    Auto()(target, propertyKey, descriptor);
    return descriptor;
  };
}